<script language="javascript">
function dogo(){
var urls = new Array();
urls[0]="site1";
urls[1]="site2";
urls[2]="site3";
urls[3]="site4";
urls[4]="site5";
n = Math.floor(Math.random()*5);
location.href= urls[n];
}
</script>
<body onload="javascript:dogo();">
</body>